Updated exclusion contours on lifetime, mass and abundance of decaying BSM relics from refined BBN modeling of hadronic and electromagnetic injections across multiple two-body channels.
Cosmological Abundance of Colored Relics
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abstract
The relic cosmological abundance of stable or long-lived neutral colored particles gets reduced by about a few orders of magnitude by annihilations that occur after QCD confinement. We compute the abundance and the cosmological bounds on relic gluinos. The same post-confinement effect strongly enhances co-annihilations with a lighter Dark Matter particle, provided that their mass difference is below a few GeV. Charged colored particles (such as stops) can instead form baryons, which can be (quasi)stable in some models.
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hep-ph 1years
2026 1verdicts
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Improved Big Bang Nucleosynthesis constraints on decaying massive relics
Updated exclusion contours on lifetime, mass and abundance of decaying BSM relics from refined BBN modeling of hadronic and electromagnetic injections across multiple two-body channels.